# Ag–Ca system

> Ag–Ca system: 59 accepted literature values (invariant reaction 46, formation 7, activity / EMF / Gibbs energy 4, phase transition 2) and 3 calculated phase diagram(s) from ORCHID, each value with evidence class, source, page and quote.

HTML: https://data.orchid-project.org/systems/AG-CA.html · Markdown: https://data.orchid-project.org/systems/AG-CA.md

59 accepted literature values from 2 paper(s) (experimental 31, model 20, unspecified 8); 3 calculated phase diagram(s). 40 further extracted value(s) not accepted by the reader-agreement checks are only in the JSON/CSV.

Data: [JSON](https://data.orchid-project.org/literature/systems/AG-CA.json) · [CSV](https://data.orchid-project.org/systems/AG-CA.csv) · [interactive explorer](https://orchid-project.org/data-explorer/#AG-CA) · [interactive phase diagram](https://orchid-project.org/phase-diagrams/#AG-CA/AgCa-08Hua.json) · [phases (10)](https://data.orchid-project.org/phases/pages/AG-CA.html) · [papers (bibliography)](https://data.orchid-project.org/bibliography/pages/systems/AG-CA.html) · [Markdown](https://data.orchid-project.org/systems/AG-CA.md)

Table: Accepted values by evidence class

| Evidence class | Values |
|---|---:|
| experimental | 31 |
| model | 20 |
| unspecified | 8 |

Table: Accepted values by property group

| Property group | Values |
|---|---:|
| invariant reaction | 46 |
| phase transition | 2 |
| formation | 7 |
| activity / EMF / Gibbs energy | 4 |

## Calculated phase diagrams

Binary phase diagrams calculated with pycalphad 0.11.2 from the SGTE binary collection (Hallstedt 2025, CC BY 4.0). Evidence class: model.

Table: Assessments with a calculated phase diagram

| TDB file | Assessment | SHA-256 | Links |
|---|---|---|---|
| AgCa-08Hua.tdb | G.X. Huang, L.B. Liu, B.R. Jia, L.G. Zhang, Z.P. Jin, J. Alloys Compd., 460, 375-78(2008). [doi:10.1016/j.jallcom.2007.06.064](https://doi.org/10.1016/j.jallcom.2007.06.064) | `426decd914817145440ee6335206476c92b072efeb6bde4fee66c8652a6f0c0d` | [viewer](https://orchid-project.org/phase-diagrams/#AG-CA/AgCa-08Hua.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/AgCa-08Hua.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/AgCa-08Hua.json) |
| AgCa-14Bra.tdb | M.H. Braga, A. Debski, W. Gasior, J. Alloys Compd., 612, 280-86(2014). [doi:10.1016/j.jallcom.2014.05.141](https://doi.org/10.1016/j.jallcom.2014.05.141) | `2e7a57eb5f5fff2b879885a86fc7f2070867755c7897ff80137db64d3105782f` | [viewer](https://orchid-project.org/phase-diagrams/#AG-CA/AgCa-14Bra.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/AgCa-14Bra.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/AgCa-14Bra.json) |
| AgCa-96Che-LB.tdb | P.-Y. Chevalier, E. Fischer, unpublished, Thermodata, 1996. | `9a265c0f2167061ba4487836811d1d60610fe4160b268e5620dc04f783a8ac03` | [viewer](https://orchid-project.org/phase-diagrams/#AG-CA/AgCa-96Che-LB.json) · [TDB](https://orchid-project.org/data/databases/sgte-binary/AgCa-96Che-LB.tdb) · [JSON](https://data.orchid-project.org/phase-diagrams/sgte/AgCa-96Che-LB.json) |

Table: Calculated three-phase invariants (model, mole fraction of the second component)

| TDB file | T (K) | Phases at the invariant |
|---|---:|---|
| AgCa-08Hua.tdb | 959.91 | LIQUID (x(Ca) 0.16273) + AG9CA2_C15B (x(Ca) 0.18182) + AG7CA2 (x(Ca) 0.22222) |
| AgCa-08Hua.tdb | 959.91 | LIQUID (x(Ca) 0.16278) + AG9CA2_C15B (x(Ca) 0.18182) + AG7CA2 (x(Ca) 0.22222) |
| AgCa-08Hua.tdb | 959.91 | LIQUID (x(Ca) 0.16263) + AG9CA2_C15B (x(Ca) 0.18182) + AG7CA2 (x(Ca) 0.22222) |
| AgCa-08Hua.tdb | 925.57 | FCC_A1 (x(Ca) 1.000e-5) + LIQUID (x(Ca) 0.12506) + AG9CA2_C15B (x(Ca) 0.18182) |
| AgCa-08Hua.tdb | 925.57 | FCC_A1 (x(Ca) 1.000e-5) + LIQUID (x(Ca) 0.12507) + AG9CA2_C15B (x(Ca) 0.18182) |
| AgCa-08Hua.tdb | 925.57 | FCC_A1 (x(Ca) 1.000e-5) + LIQUID (x(Ca) 0.12501) + AG9CA2_C15B (x(Ca) 0.18182) |
| AgCa-08Hua.tdb | 925.57 | FCC_A1 (x(Ca) 1.000e-5) + LIQUID (x(Ca) 0.125) + AG9CA2_C15B (x(Ca) 0.18182) |
| AgCa-08Hua.tdb | 869.97 | AG7CA2 (x(Ca) 0.22222) + LIQUID (x(Ca) 0.32976) + AG2CA (x(Ca) 0.33333) |
| AgCa-08Hua.tdb | 869.96 | AG7CA2 (x(Ca) 0.22222) + LIQUID (x(Ca) 0.32996) + AG2CA (x(Ca) 0.33333) |
| AgCa-08Hua.tdb | 827.85 | AGCA_B33 (x(Ca) 0.5) + LIQUID (x(Ca) 0.60039) + AG3CA5_D8L (x(Ca) 0.625) |
| AgCa-08Hua.tdb | 827.85 | AGCA_B33 (x(Ca) 0.5) + LIQUID (x(Ca) 0.6005) + AG3CA5_D8L (x(Ca) 0.625) |
| AgCa-08Hua.tdb | 827.85 | AGCA_B33 (x(Ca) 0.5) + LIQUID (x(Ca) 0.60005) + AG3CA5_D8L (x(Ca) 0.625) |
| AgCa-08Hua.tdb | 820.76 | AG2CA (x(Ca) 0.33333) + LIQUID (x(Ca) 0.4021) + AGCA_B33 (x(Ca) 0.5) |
| AgCa-08Hua.tdb | 747.94 | AG3CA5_D8L (x(Ca) 0.625) + LIQUID (x(Ca) 0.74997) + AGCA3 (x(Ca) 0.75) |
| AgCa-08Hua.tdb | 747.94 | AG3CA5_D8L (x(Ca) 0.625) + LIQUID (x(Ca) 0.74983) + AGCA3 (x(Ca) 0.75) |
| AgCa-08Hua.tdb | 736.72 | AGCA3 (x(Ca) 0.75) + LIQUID (x(Ca) 0.79588) + BCC_A2 (x(Ca) 0.99998) |
| AgCa-08Hua.tdb | 736.72 | AGCA3 (x(Ca) 0.75) + LIQUID (x(Ca) 0.79596) + BCC_A2 (x(Ca) 0.99998) |
| AgCa-08Hua.tdb | 716.06 | AGCA3 (x(Ca) 0.75) + FCC_A1 (x(Ca) 0.99998) + BCC_A2 (x(Ca) 0.99999) |
| AgCa-14Bra.tdb | 953.91 | LIQUID (x(Ca) 0.15586) + AG9CA2_C15B (x(Ca) 0.18182) + AG7CA2 (x(Ca) 0.22222) |
| AgCa-14Bra.tdb | 953.91 | LIQUID (x(Ca) 0.15609) + AG9CA2_C15B (x(Ca) 0.18182) + AG7CA2 (x(Ca) 0.22222) |
| AgCa-14Bra.tdb | 953.91 | LIQUID (x(Ca) 0.1557) + AG9CA2_C15B (x(Ca) 0.18182) + AG7CA2 (x(Ca) 0.22222) |
| AgCa-14Bra.tdb | 927.43 | FCC_A1 (x(Ca) 1.000e-5) + LIQUID (x(Ca) 0.12679) + AG9CA2_C15B (x(Ca) 0.18182) |
| AgCa-14Bra.tdb | 927.43 | FCC_A1 (x(Ca) 1.000e-5) + LIQUID (x(Ca) 0.12681) + AG9CA2_C15B (x(Ca) 0.18182) |
| AgCa-14Bra.tdb | 927.43 | FCC_A1 (x(Ca) 1.000e-5) + LIQUID (x(Ca) 0.12672) + AG9CA2_C15B (x(Ca) 0.18182) |
| AgCa-14Bra.tdb | 927.43 | FCC_A1 (x(Ca) 1.000e-5) + LIQUID (x(Ca) 0.12671) + AG9CA2_C15B (x(Ca) 0.18182) |
| AgCa-14Bra.tdb | 867.72 | AG7CA2 (x(Ca) 0.22222) + AG2CA (x(Ca) 0.33333) + LIQUID (x(Ca) 0.33616) |
| AgCa-14Bra.tdb | 867.72 | AG7CA2 (x(Ca) 0.22222) + AG2CA (x(Ca) 0.33333) + LIQUID (x(Ca) 0.33606) |
| AgCa-14Bra.tdb | 827.97 | AG2CA (x(Ca) 0.33333) + LIQUID (x(Ca) 0.39661) + AGCA_B33 (x(Ca) 0.5) |
| AgCa-14Bra.tdb | 827.97 | AG2CA (x(Ca) 0.33333) + LIQUID (x(Ca) 0.39681) + AGCA_B33 (x(Ca) 0.5) |
| AgCa-14Bra.tdb | 821.42 | AGCA_B33 (x(Ca) 0.5) + LIQUID (x(Ca) 0.61374) + AG3CA5_D8L (x(Ca) 0.625) |
| AgCa-14Bra.tdb | 821.42 | AGCA_B33 (x(Ca) 0.5) + LIQUID (x(Ca) 0.61358) + AG3CA5_D8L (x(Ca) 0.625) |
| AgCa-14Bra.tdb | 748.1 | AG3CA5_D8L (x(Ca) 0.625) + LIQUID (x(Ca) 0.72987) + AGCA3 (x(Ca) 0.75) |
| AgCa-14Bra.tdb | 748.1 | AG3CA5_D8L (x(Ca) 0.625) + LIQUID (x(Ca) 0.72982) + AGCA3 (x(Ca) 0.75) |
| AgCa-14Bra.tdb | 746.09 | AGCA3 (x(Ca) 0.75) + LIQUID (x(Ca) 0.77828) + BCC_A2 (x(Ca) 0.99998) |
| AgCa-14Bra.tdb | 746.09 | AGCA3 (x(Ca) 0.75) + LIQUID (x(Ca) 0.77836) + BCC_A2 (x(Ca) 0.99998) |
| AgCa-14Bra.tdb | 716.06 | AGCA3 (x(Ca) 0.75) + FCC_A1 (x(Ca) 0.99998) + BCC_A2 (x(Ca) 0.99999) |
| AgCa-96Che-LB.tdb | 961.37 | LIQUID (x(Ca) 0.16731) + AG9CA2_C15B (x(Ca) 0.18182) + AG7CA2 (x(Ca) 0.22222) |
| AgCa-96Che-LB.tdb | 961.37 | LIQUID (x(Ca) 0.16743) + AG9CA2_C15B (x(Ca) 0.18182) + AG7CA2 (x(Ca) 0.22222) |
| AgCa-96Che-LB.tdb | 961.37 | LIQUID (x(Ca) 0.16715) + AG9CA2_C15B (x(Ca) 0.18182) + AG7CA2 (x(Ca) 0.22222) |
| AgCa-96Che-LB.tdb | 915.03 | FCC_A1 (x(Ca) 0) + LIQUID (x(Ca) 0.11871) + AG9CA2_C15B (x(Ca) 0.18182) |
| AgCa-96Che-LB.tdb | 915.03 | FCC_A1 (x(Ca) 0) + LIQUID (x(Ca) 0.11871) + AG9CA2_C15B (x(Ca) 0.18182) |
| AgCa-96Che-LB.tdb | 915.02 | FCC_A1 (x(Ca) 0) + LIQUID (x(Ca) 0.11893) + AG9CA2_C15B (x(Ca) 0.18182) |
| AgCa-96Che-LB.tdb | 915.02 | FCC_A1 (x(Ca) 0) + LIQUID (x(Ca) 0.11888) + AG9CA2_C15B (x(Ca) 0.18182) |
| AgCa-96Che-LB.tdb | 861.63 | AG7CA2 (x(Ca) 0.22222) + AG2CA (x(Ca) 0.33333) + LIQUID (x(Ca) 0.34146) |
| AgCa-96Che-LB.tdb | 861.63 | AG7CA2 (x(Ca) 0.22222) + AG2CA (x(Ca) 0.33333) + LIQUID (x(Ca) 0.34123) |
| AgCa-96Che-LB.tdb | 838.55 | AG2CA (x(Ca) 0.33333) + LIQUID (x(Ca) 0.38751) + AGCA_B33 (x(Ca) 0.5) |
| AgCa-96Che-LB.tdb | 838.54 | AG2CA (x(Ca) 0.33333) + LIQUID (x(Ca) 0.38768) + AGCA_B33 (x(Ca) 0.5) |
| AgCa-96Che-LB.tdb | 838.54 | AG2CA (x(Ca) 0.33333) + LIQUID (x(Ca) 0.3878) + AGCA_B33 (x(Ca) 0.5) |
| AgCa-96Che-LB.tdb | 829.55 | AGCA_B33 (x(Ca) 0.5) + AG3CA5_D8L (x(Ca) 0.625) + LIQUID (x(Ca) 0.62957) |
| AgCa-96Che-LB.tdb | 829.55 | AGCA_B33 (x(Ca) 0.5) + AG3CA5_D8L (x(Ca) 0.625) + LIQUID (x(Ca) 0.62953) |
| AgCa-96Che-LB.tdb | 756.61 | AG3CA5_D8L (x(Ca) 0.625) + LIQUID (x(Ca) 0.74471) + AGCA3 (x(Ca) 0.75) |
| AgCa-96Che-LB.tdb | 756.61 | AG3CA5_D8L (x(Ca) 0.625) + LIQUID (x(Ca) 0.74446) + AGCA3 (x(Ca) 0.75) |
| AgCa-96Che-LB.tdb | 756.61 | AG3CA5_D8L (x(Ca) 0.625) + LIQUID (x(Ca) 0.74489) + AGCA3 (x(Ca) 0.75) |
| AgCa-96Che-LB.tdb | 745.38 | AGCA3 (x(Ca) 0.75) + LIQUID (x(Ca) 0.79811) + BCC_A2 (x(Ca) 0.99994) |
| AgCa-96Che-LB.tdb | 745.38 | AGCA3 (x(Ca) 0.75) + LIQUID (x(Ca) 0.79817) + BCC_A2 (x(Ca) 0.99994) |
| AgCa-96Che-LB.tdb | 715.86 | AGCA3 (x(Ca) 0.75) + BCC_A2 (x(Ca) 0.99996) + FCC_A1 (x(Ca) 1) |
| AgCa-96Che-LB.tdb | 715.86 | AGCA3 (x(Ca) 0.75) + BCC_A2 (x(Ca) 0.99996) + FCC_A1 (x(Ca) 1) |

Convex hulls: [Materials Project DFT hull](https://data.orchid-project.org/hulls/dft-mp/AG/AG-CA.json) · [OQMD DFT hull](https://data.orchid-project.org/hulls/dft-oqmd/AG/AG-CA.json) · [CALPHAD hull AgCa-08Hua](https://data.orchid-project.org/hulls/calphad-sgte/AG/AG-CA--AgCa-08Hua.json) · [CALPHAD hull AgCa-96Che-LB](https://data.orchid-project.org/hulls/calphad-sgte/AG/AG-CA--AgCa-96Che-LB.json)

## Invariant reactions (literature)

Table: Invariant reactions reported in the literature for the Ag–Ca system (46)

| T (K) | Reaction / phases | Compositions (mole fraction) | Class | Source | Location | Quote |
|---:|---|---|---|---|---|---|
| 1002 | congruent melting: Liquid \<-> Ag7Ca2 | Liquid: Ag 0.777778, Ca 0.222222; Ag7Ca2: Ag 0.777778, Ca 0.222222 | model | [1] Braga 2014 | Table 3, p. 6, row 25; `ORC-SGPM7W67XD` |  |
| 997 | congruent melting: Liquid \<-> Ag7Ca2 | Liquid: Ag 0.777778, Ca 0.222222; Ag7Ca2: Ag 0.777778, Ca 0.222222 | experimental | [1] Braga 2014 | Table 3, p. 6, row 24; `ORC-6MZFMEKOR6` |  |
| 961 | peritectic: Liquid + Ag7Ca2 \<-> Ag9Ca2 | Ag7Ca2: Ag 0.777778, Ca 0.222222; Ag9Ca2: Ag 0.818182, Ca 0.181818 | experimental | [1] Braga 2014; _cites Alexander 1969_ [doi](https://doi.org/10.1139/v69-093) | Table 3, p. 6, row 4; `ORC-YL5WJ5D5P4` |  |
| 960 | peritectic: L + Ca2Ag7 -> Ca2Ag9 | L: Ca 0.163; Ca2Ag7: Ca 0.222; Ca2Ag9: Ca 0.182 | model | [2] Huang 2008 | Table 3, p. 3, row 3; `ORC-5HBHSG3YOV` |  |
| 960 | peritectic: L + Ca2Ag7 -> Ca2Ag9 | L: Ca 0.182; Ca2Ag7: Ca 0.222; Ca2Ag9: Ca 0.182 | unspecified | [2] Huang 2008; _cites Baren 1988_ [doi](https://doi.org/10.1007/bf02881269) | Table 3, p. 3, row 4; `ORC-XBNRXZVQDY` |  |
| 959 | peritectic: Liquid + Ag7Ca2 \<-> Ag9Ca2 | Ag7Ca2: Ag 0.777778, Ca 0.222222; Ag9Ca2: Ag 0.818182, Ca 0.181818 | experimental | [1] Braga 2014; _cites Alexander 1969_ [doi](https://doi.org/10.1139/v69-093) | Table 3, p. 6, row 5; `ORC-XFQENERPS2` |  |
| 954 | peritectic: Liquid + Ag7Ca2 \<-> Ag9Ca2 | Liquid: Ca 0.156; Ag7Ca2: Ag 0.777778, Ca 0.222222; Ag9Ca2: Ag 0.818182, Ca 0.181818 | model | [1] Braga 2014 | Table 3, p. 6, row 6; `ORC-HCFW42AAIU` |  |
| 938 | congruent melting: Liquid \<-> AgCa | Liquid: Ag 0.5, Ca 0.5; AgCa: Ag 0.5, Ca 0.5 | experimental | [1] Braga 2014; _cites Pascal 1970_ | Table 3, p. 6, row 26; `ORC-BX77QEHNXB` |  |
| 932 | congruent melting: Liquid \<-> AgCa | Liquid: Ag 0.5, Ca 0.5; AgCa: Ag 0.5, Ca 0.5 | model | [1] Braga 2014 | Table 3, p. 6, row 28; `ORC-Q37SKZSYMI` |  |
| 928 | eutectic: Liquid \<-> Ag (fcc A1) + Ag9Ca2 | Liquid: Ca 0.127; Ag9Ca2: Ag 0.818182, Ca 0.181818 | model | [1] Braga 2014 | Table 3, p. 6, row 3; `ORC-6PZDC2TX25` |  |
| 928 | eutectic: Liquid \<-> Ag (fcc A1) + Ag9Ca2 | Ag9Ca2: Ag 0.818182, Ca 0.181818 | experimental | [1] Braga 2014; _cites Alexander 1969_ [doi](https://doi.org/10.1139/v69-093) | Table 3, p. 6, row 1; `ORC-JITEVOUJTZ` |  |
| 928 | eutectic: L -> (Ag) + Ag9Ca2 | L: Ca 0.14; (Ag): Ca 0; Ag9Ca2: Ca 0.182 | unspecified | [2] Huang 2008; _cites Baren 1988_ [doi](https://doi.org/10.1007/bf02881269) | Table 3, p. 3, row 2; `ORC-ZPU3OMYXHS` |  |
| 926 | eutectic: L -> (Ag) + Ag9Ca2 | L: Ca 0.125; (Ag): Ca 0; Ag9Ca2: Ca 0.182 | model | [2] Huang 2008 | Table 3, p. 3, row 1; `ORC-TY3FA3A76N` |  |
| 917 | eutectic: Liquid \<-> Ag (fcc A1) + Ag9Ca2 | Ag9Ca2: Ag 0.818182, Ca 0.181818 | experimental | [1] Braga 2014; _cites Alexander 1969_ [doi](https://doi.org/10.1139/v69-093) | Table 3, p. 6, row 2; `ORC-AF3KPULWXX` |  |
| 871 | peritectic: Liquid + Ag7Ca2 \<-> Ag2Ca | Ag7Ca2: Ag 0.777778, Ca 0.222222; Ag2Ca: Ag 0.666667, Ca 0.333333 | experimental | [1] Braga 2014; _cites Alexander 1969_ [doi](https://doi.org/10.1139/v69-093) | Table 3, p. 6, row 7; `ORC-4SKY4ZYCSO` |  |
| 870 | peritectic: L + Ca2Ag7 -> Ca Ag2 | L: Ca 0.333; Ca2Ag7: Ca 0.222; Ca Ag2: Ca 0.332 | unspecified | [2] Huang 2008; _cites Baren 1988_ [doi](https://doi.org/10.1007/bf02881269) | Table 3, p. 3, row 8; `ORC-FDDCZBHHO7` |  |
| 870 | peritectic: L + Ca2Ag7 -> Ca Ag2 | L: Ca 0.33; Ca2Ag7: Ca 0.222; Ca Ag2: Ca 0.333 | model | [2] Huang 2008 | Table 3, p. 3, row 7; `ORC-GKUVCEOMNK` |  |
| 868 | peritectic: Liquid + Ag7Ca2 \<-> Ag2Ca | Liquid: Ca 0.336; Ag7Ca2: Ag 0.777778, Ca 0.222222; Ag2Ca: Ag 0.666667, Ca 0.333333 | model | [1] Braga 2014 | Table 3, p. 6, row 9; `ORC-6W3QFPTEMS` |  |
| 831 | eutectic: Liquid \<-> AgCa + Ag3Ca5 | AgCa: Ag 0.5, Ca 0.5; Ag3Ca5: Ag 0.375, Ca 0.625 | experimental | [1] Braga 2014; _cites Alexander 1969_ [doi](https://doi.org/10.1139/v69-093) | Table 3, p. 6, row 13; `ORC-LNXBWPC5AR` |  |
| 831 | congruent melting: Liquid \<-> Ag3Ca5 | Liquid: Ag 0.375, Ca 0.625; Ag3Ca5: Ag 0.375, Ca 0.625 | experimental | [1] Braga 2014; _cites Pascal 1970_ | Table 3, p. 6, row 30; `ORC-XPAMO7ROCI` |  |
| 828 | congruent melting: Liquid \<-> Ag3Ca5 | Liquid: Ag 0.375, Ca 0.625; Ag3Ca5: Ag 0.375, Ca 0.625 | experimental | [1] Braga 2014; _cites Pascal 1970_ | Table 3, p. 6, row 29; `ORC-CKKGTX3U2E` |  |
| 828 | eutectic: L -> CaAg + Ca5Ag3 | L: Ca 0.6; CaAg: Ca 0.5; Ca5Ag3: Ca 0.625 | model | [2] Huang 2008 | Table 3, p. 3, row 13; `ORC-CLUVVPHKMD` |  |
| 828 | peritectic: L + CaAg -> Ca5Ag3 | L: Ca 0.625; CaAg: Ca 0.5; Ca5Ag3: Ca 0.625 | unspecified | [2] Huang 2008; _cites Baren 1988_ [doi](https://doi.org/10.1007/bf02881269) | Table 3, p. 3, row 14; `ORC-MBJITQ3DUP` |  |
| 828 | eutectic: Liquid \<-> Ag2Ca + AgCa | Liquid: Ca 0.397; Ag2Ca: Ag 0.666667, Ca 0.333333; AgCa: Ag 0.5, Ca 0.5 | model | [1] Braga 2014 | Table 3, p. 6, row 12; `ORC-MHAECBNCB6` |  |
| 825 | eutectic: Liquid \<-> AgCa + Ag3Ca5 | AgCa: Ag 0.5, Ca 0.5; Ag3Ca5: Ag 0.375, Ca 0.625 | experimental | [1] Braga 2014; _cites Alexander 1969_ [doi](https://doi.org/10.1139/v69-093) | Table 3, p. 6, row 14; `ORC-2VFC4AI2M6` |  |
| 822 | congruent melting: Liquid \<-> Ag3Ca5 | Liquid: Ag 0.375, Ca 0.625; Ag3Ca5: Ag 0.375, Ca 0.625 | model | [1] Braga 2014 | Table 3, p. 6, row 31; `ORC-TVDGEILKAD` |  |
| 821 | eutectic: Liquid \<-> AgCa + Ag3Ca5 | AgCa: Ag 0.5, Ca 0.5; Ag3Ca5: Ag 0.375, Ca 0.625 | model | [1] Braga 2014 | Table 3, p. 6, row 16; `ORC-4FCXKJDMUO` |  |
| 821 | eutectic: L -> CaAg2 + CaAg | L: Ca 0.402; CaAg2: Ca 0.333; CaAg: Ca 0.5 | model | [2] Huang 2008 | Table 3, p. 3, row 9; `ORC-S2X33NAUT3` |  |
| 820 | eutectic: Liquid \<-> AgCa + Ag3Ca5 | Liquid: Ca 0.614; AgCa: Ag 0.5, Ca 0.5; Ag3Ca5: Ag 0.375, Ca 0.625 | experimental | [1] Braga 2014; _cites Pascal 1970_ | Table 3, p. 6, row 15; `ORC-2DO67WNTKT` |  |
| 819 | eutectic: Liquid \<-> Ag2Ca + AgCa | Ag2Ca: Ag 0.666667, Ca 0.333333; AgCa: Ag 0.5, Ca 0.5 | experimental | [1] Braga 2014; _cites Alexander 1969_ [doi](https://doi.org/10.1139/v69-093) | Table 3, p. 6, row 10; `ORC-UWGD3WKNYK` |  |
| 818 | eutectic: L -> CaAg2 + CaAg | L: Ca 0.395; CaAg2: Ca 0.333; CaAg: Ca 0.5 | unspecified | [2] Huang 2008; _cites Baren 1988_ [doi](https://doi.org/10.1007/bf02881269) | Table 3, p. 3, row 10; `ORC-JWQVHUHBOW` |  |
| 807 | eutectic: Liquid \<-> Ag2Ca + AgCa | Ag2Ca: Ag 0.666667, Ca 0.333333; AgCa: Ag 0.5, Ca 0.5 | experimental | [1] Braga 2014; _cites Alexander 1969_ [doi](https://doi.org/10.1139/v69-093) | Table 3, p. 6, row 11; `ORC-EOXWIEWFPL` |  |
| 756 | congruent melting: Liquid \<-> AgCa3 | Liquid: Ag 0.25, Ca 0.75; AgCa3: Ag 0.25, Ca 0.75 | experimental | [1] Braga 2014; _cites Pascal 1970_ | Table 3, p. 6, row 33; `ORC-UTPIWMQGWX` |  |
| 751 | eutectic: Liquid \<-> Ag3Ca5 + AgCa3 | Ag3Ca5: Ag 0.375, Ca 0.625; AgCa3: Ag 0.25, Ca 0.75 | experimental | [1] Braga 2014; _cites Alexander 1969_ [doi](https://doi.org/10.1139/v69-093) | Table 3, p. 6, row 17; `ORC-3ASTEIWM6V` |  |
| 751 | congruent melting: Liquid \<-> AgCa3 | Liquid: Ag 0.25, Ca 0.75; AgCa3: Ag 0.25, Ca 0.75 | model | [1] Braga 2014 | Table 3, p. 6, row 34; `ORC-GPJQGCHQUW` |  |
| 748 | peritectic: L + Ca5Ag3 -> Ca3Ag | L: Ca 0.75; Ca5Ag3: Ca 0.625; Ca3Ag: Ca 0.75 | unspecified | [2] Huang 2008; _cites Baren 1988_ [doi](https://doi.org/10.1007/bf02881269) | Table 3, p. 3, row 16; `ORC-2MS7NHDTSU` |  |
| 748 | eutectic: Liquid \<-> Ag3Ca5 + AgCa3 | Ag3Ca5: Ag 0.375, Ca 0.625; AgCa3: Ag 0.25, Ca 0.75 | experimental | [1] Braga 2014; _cites Pascal 1970_ | Table 3, p. 6, row 18; `ORC-JIYFN2IMAA` |  |
| 748 | peritectic: L + Ca5Ag3 -> Ca3Ag | L: Ca 0.75; Ca5Ag3: Ca 0.625; Ca3Ag: Ca 0.75 | model | [2] Huang 2008 | Table 3, p. 3, row 15; `ORC-JRSBAPA332` |  |
| 748 | eutectic: Liquid \<-> Ag3Ca5 + AgCa3 | Liquid: Ca 0.73; Ag3Ca5: Ag 0.375, Ca 0.625; AgCa3: Ag 0.25, Ca 0.75 | model | [1] Braga 2014 | Table 3, p. 6, row 19; `ORC-KLAII7HDYU` |  |
| 747 | congruent melting: Liquid \<-> AgCa3 | Liquid: Ag 0.25, Ca 0.75; AgCa3: Ag 0.25, Ca 0.75 | experimental | [1] Braga 2014; _cites Alexander 1969_ [doi](https://doi.org/10.1139/v69-093) | Table 3, p. 6, row 32; `ORC-J2O3LCREKB` |  |
| 746 | eutectic: Liquid \<-> AgCa3 + Ca (bcc A2) | Liquid: Ca 0.778; AgCa3: Ag 0.25, Ca 0.75 | model | [1] Braga 2014 | Table 3, p. 6, row 22; `ORC-BYPYNJTT7Q` |  |
| 743 | eutectic: L -> Ca3Ag + (βCa) | L: Ca 0.8; Ca3Ag: Ca 0.75; (βCa): Ca 1 | unspecified | [2] Huang 2008; _cites Baren 1988_ [doi](https://doi.org/10.1007/bf02881269) | Table 3, p. 3, row 18; `ORC-BJFL4UQ7FM` |  |
| 743 | eutectic: Liquid \<-> AgCa3 + Ca (bcc A2) | AgCa3: Ag 0.25, Ca 0.75 | experimental | [1] Braga 2014; _cites Pascal 1970_ | Table 3, p. 6, row 20; `ORC-FEHZWOVTGU` |  |
| 737 | eutectic: L -> Ca3Ag + (βCa) | L: Ca 0.796; Ca3Ag: Ca 0.75; (βCa): Ca 1 | model | [2] Huang 2008 | Table 3, p. 3, row 17; `ORC-BUE4W6QWLA` |  |
| 733 | eutectic: Liquid \<-> AgCa3 + Ca (bcc A2) | AgCa3: Ag 0.25, Ca 0.75 | experimental | [1] Braga 2014; _cites Pascal 1970_ | Table 3, p. 6, row 21; `ORC-W4RIR2QASS` |  |
| 716 | polymorphic: Ca (bcc A2) \<-> Ca (fcc A1) |  | model | [1] Braga 2014 | Table 3, p. 6, row 23; `ORC-THJWQ6TCME` |  |

## Formation enthalpies

Literature values in kJ/mol-atom where the per-atom basis is known. DFT columns: the lowest-energy entry at the same composition (Materials Project 2026.04.13, OQMD v1.8; different energy references, never averaged), from [dft_parity.json](https://data.orchid-project.org/literature/dft_parity.json).

Table: Enthalpies of formation, Ag–Ca system (7)

| Phase | Compound | Value | T (K) | Class | MP DFT (kJ/mol-atom) | OQMD DFT (kJ/mol-atom) | Source | Location | Quote |
|---|---|---:|---:|---|---:|---:|---|---|---|
| Ag9Ca2 |  | -15.2 kJ/mol-atom | 298.15 | experimental |  |  | [1] Braga 2014 | Table 1, p. 2, row 2; `ORC-SLPLKWLDDS` |  |
| Ag9Ca2 |  | -15.1 kJ/mol-atom | 298.15 | experimental |  |  | [1] Braga 2014 | Table 1, p. 2, row 5; `ORC-K5URMPICWT` |  |
| Ag9Ca2 |  | -14.6 kJ/mol-atom | 298.15 | experimental |  |  | [1] Braga 2014 | Table 1, p. 2, row 3; `ORC-TR56TPVKUH` |  |
| Ag9Ca2 |  | -14.5 kJ/mol-atom | 298.15 | experimental |  |  | [1] Braga 2014 | Table 1, p. 2, row 4; `ORC-NGJRNJDINQ` |  |
| AgCa3 | [AgCa3](https://data.orchid-project.org/compounds/AgCa3.html) | -12.5 kJ/mol-atom | 298.15 | experimental | -5.282 (mp-aaacpirk) | -20.024 (oqmd-1787095) | [1] Braga 2014 | Table 1, p. 2, row 8; `ORC-2VNCCCYMWG` |  |
| AgCa3 | [AgCa3](https://data.orchid-project.org/compounds/AgCa3.html) | -11.6 kJ/mol-atom | 298.15 | experimental | -5.282 (mp-aaacpirk) | -20.024 (oqmd-1787095) | [1] Braga 2014 | Table 1, p. 2, row 10; `ORC-BBFV5NQPZQ` |  |
| AgCa3 | [AgCa3](https://data.orchid-project.org/compounds/AgCa3.html) | -11.3 kJ/mol-atom | 298.15 | experimental | -5.282 (mp-aaacpirk) | -20.024 (oqmd-1787095) | [1] Braga 2014 | Table 1, p. 2, row 9; `ORC-IWL4BI4Y4N` |  |

## Other properties

### Phase transition (2)

Table: Phase transition, Ag–Ca system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Phase transition | 938 K | 938 | congruent melting: L -> CaAg; _L: Ca 0.5; CaAg: Ca 0.5_ | model | [2] Huang 2008 | Table 3, p. 3, row 11; `ORC-2TWQVDKUUV` |  |
| Phase transition | 939 K | 939 | congruent melting: L -> CaAg; _L: Ca 0.5; CaAg: Ca 0.5_ | unspecified | [2] Huang 2008; _cites Baren 1988_ [doi](https://doi.org/10.1007/bf02881269) | Table 3, p. 3, row 12; `ORC-DHEUXOALRE` |  |

### Activity / EMF / Gibbs energy (4)

Table: Activity / EMF / Gibbs energy, Ag–Ca system

| Property | Value | T (K) | Phases / composition | Class | Source | Location | Quote |
|---|---:|---:|---|---|---|---|---|
| Gibbs energy; _printed: free energy of formation_ | -15.7 kJ/mol | 830 |  | experimental | [2] Huang 2008; _cites Notin 1982_ [doi](https://doi.org/10.1016/0364-5916%2882%2990015-3) | p. 1; `ORC-HZBWSNHSS7.93e596` | “Notin and Hertz \[11\] determined the free energy of formation of Ca2 Ag9 , Ca2 Ag7 , CaAg2 and CaAg at 830 K to be -15.7, -18.9, -22.5 and -25 kJ/mol, respectively.” |
| Gibbs energy; _printed: free energy of formation_ | -25 kJ/mol | 830 |  | experimental | [2] Huang 2008; _cites Notin 1982_ [doi](https://doi.org/10.1016/0364-5916%2882%2990015-3) | p. 1; `ORC-HZBWSNHSS7.970d52` | “Notin and Hertz \[11\] determined the free energy of formation of Ca2 Ag9 , Ca2 Ag7 , CaAg2 and CaAg at 830 K to be -15.7, -18.9, -22.5 and -25 kJ/mol, respectively.” |
| Gibbs energy; _printed: free energy of formation_ | -18.9 kJ/mol | 830 |  | experimental | [2] Huang 2008; _cites Notin 1982_ [doi](https://doi.org/10.1016/0364-5916%2882%2990015-3) | p. 1; `ORC-HZBWSNHSS7.eda302` | “Notin and Hertz \[11\] determined the free energy of formation of Ca2 Ag9 , Ca2 Ag7 , CaAg2 and CaAg at 830 K to be -15.7, -18.9, -22.5 and -25 kJ/mol, respectively.” |
| Gibbs energy; _printed: free energy of formation_ | -22.5 kJ/mol | 830 |  | experimental | [2] Huang 2008; _cites Notin 1982_ [doi](https://doi.org/10.1016/0364-5916%2882%2990015-3) | p. 1; `ORC-HZBWSNHSS7.faa9fb` | “Notin and Hertz \[11\] determined the free energy of formation of Ca2 Ag9 , Ca2 Ag7 , CaAg2 and CaAg at 830 K to be -15.7, -18.9, -22.5 and -25 kJ/mol, respectively.” |

## Sources

Reporting papers the values were read from (a value cited from another work names that work in its row).

1. M. Helena Braga, Adam Dębski, Władysław Gąsior, Optimization and assessment of the Ag–Ca phase diagram, Journal of Alloys and Compounds 612, 280-286 (2014). [doi:10.1016/j.jallcom.2014.05.141](https://doi.org/10.1016/j.jallcom.2014.05.141)
2. G.X. Huang, L.B. Liu, B.R. Jia, L.G. Zhang, Z.P. Jin, Thermodynamic modeling of the Ca–Ag binary system, Journal of Alloys and Compounds 460, 375-378 (2008). [doi:10.1016/j.jallcom.2007.06.064](https://doi.org/10.1016/j.jallcom.2007.06.064)

## Please cite

- R. Arróyave, J. Saal, D. Shin, ORCHID-Values: thermodynamic and phase-equilibrium values read from the literature (version 2026.10; Version 1, machine-extracted), Zenodo (2026). https://doi.org/10.5281/zenodo.23735569
- R. Arróyave, J. Saal, D. Shin, ORCHID-Diagrams: calculated binary phase diagrams (version 2026.10), Zenodo (2026). https://doi.org/10.5281/zenodo.23735859
- R. Arróyave, J. Saal, D. Shin, ORCHID-Hulls: binary convex hulls (Materials Project, OQMD, assessed CALPHAD) (version 2026.10), Zenodo (2026). https://doi.org/10.5281/zenodo.23735891
- R. Arróyave, J. Saal, D. Shin, ORCHID data: umbrella record of the ORCHID datasets (version 2026.10; Version 1, machine-extracted), Zenodo (2026). https://doi.org/10.5281/zenodo.23736065

Also cite the original source of every value you use (paper_citation / paper_doi, and cited_dois for values the paper cites from earlier work); B. Hallstedt, The SGTE collection of binary datasets, Calphad 89 (2025) 102833, https://doi.org/10.1016/j.calphad.2025.102833 (CC BY 4.0), and the original assessment named in each file; A. Jain et al., The Materials Project: A materials genome approach to accelerating materials innovation, APL Materials 1 (2013) 011002, https://doi.org/10.1063/1.4812323 (CC BY 4.0); J. E. Saal et al., JOM 65 (2013) 1501, https://doi.org/10.1007/s11837-013-0755-4 and S. Kirklin et al., npj Comput. Mater. 1 (2015) 15010, https://doi.org/10.1038/npjcompumats.2015.10 (CC BY 4.0).

Version 1, machine-extracted: values were read by language-model readers constrained to quote their source and checked automatically, and the release was then audited on the printed pages by adversarial audits, an independent second review of fit-facing records and a preliminary human review of a frozen sample. Flags such as accepted and ESPEI-ready record screening results, not certification; known issues are listed in the release notes.

```bibtex
@misc{orchid_literature_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Values: thermodynamic and phase-equilibrium values read from the literature}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735569},
  url       = {https://doi.org/10.5281/zenodo.23735569},
  note      = {Version 1, machine-extracted}
}

@misc{orchid_phase_diagrams_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Diagrams: calculated binary phase diagrams}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735859},
  url       = {https://doi.org/10.5281/zenodo.23735859}
}

@misc{orchid_hulls_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID-Hulls: binary convex hulls (Materials Project, OQMD, assessed CALPHAD)}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23735891},
  url       = {https://doi.org/10.5281/zenodo.23735891}
}

@misc{orchid_data_2026,
  author    = {Arr{\'o}yave, Raymundo and Saal, James and Shin, Dongwon},
  title     = {{ORCHID data: umbrella record of the ORCHID datasets}},
  version   = {2026.10},
  publisher = {Zenodo},
  year      = {2026},
  doi       = {10.5281/zenodo.23736065},
  url       = {https://doi.org/10.5281/zenodo.23736065},
  note      = {Version 1, machine-extracted}
}
```

---

Derived data CC BY 4.0 ([licence](https://creativecommons.org/licenses/by/4.0/)): cite ORCHID ([CITATION.cff](https://data.orchid-project.org/CITATION.cff)) and the original sources. Quotes are short excerpts kept so that each value can be checked; they remain under the publishers' copyright and are not relicensed. Source papers, page images and full text are not redistributed. Field reference: [SCHEMA.md](https://data.orchid-project.org/literature/SCHEMA.md). Machine-readable guide: [llms.txt](https://data.orchid-project.org/llms.txt). Found an error? The report link of a value (Markdown: its id, ORC-..., in the Location column) opens a pre-filled GitHub issue, https://github.com/orchid-calphad/orchid-data/issues/new?template=report-value-error.yml&record_id=\<id>, carrying only the record id, source and value; [how to contribute](https://orchid-project.org/contribute/).